A free app for Android, by Gabriel Simões.

The Audio Speed Changer for Android allows you to modify the playback speed of your audio files in real-time, without changing their audible characteristics. It is useful for people who need to listen to audiobooks or podcasts more slowly, or for people who have hearing problems.

It is a simple and fun way to improve your listening experience. It is very easy to use. You can use it to speed up or slow down audio files. It allows you to keep the same sonic characteristics. It works on most Android devices and versions.